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請教Javascript程式，想修改一下@@
你好，我打算用javascript設計一個等級計算器，可是不太會，已經有大大賜教了謝謝~不過想修改一下，可是不會，有大大能教我一下嗎？
https://tw.knowledge.yahoo.com/question/question?q...
==============
<script type="text/javascript">
function calculate() {
var total = 0;
total += get_score("page1", "result1");
total += get_score("page2", "result2");
total += get_score("page3", "result3");
var total_grade = get_grade(total / 3);
document.getElementById("overall").innerHTML = total_grade;
}
function get_score(score_from, result_to) {
var score = parseInt(document.getElementById(score_from).value);
document.getElementById(result_to).innerHTML = get_grade(score);
return score
}
function get_grade(score) {
var result = "D";
if (score >= 90) {
result = "A";
} else if (score >= 80) {
result = "B";
}
return result;
}
</script>
===================
想修改的部份：
例如說卷一、卷二、卷三不同分數給相同等級才對。
卷一90分A級
卷二70分A級
卷三60分A級
只是很大概教一下就可以了，謝謝。初學者，想很久都沒頭緒。
1 個解答
- ?Lv 76 年前最愛解答
<script type="text/javascript">
var GradeStrategy = function() {
this.strategy = "";
};
GradeStrategy.prototype = {
setStrategy: function(strategy) {
this.strategy = strategy;
},
getGrade: function(score) {
return this.strategy.getGrade(score);
}
};
var GradeStrategy1 = function() {
this.getGrade = function(score) {
if (score >= 90) return "A";
if (score >= 80) return "B";
return "F";
}
};
var GradeStrategy2 = function() {
this.getGrade = function(score) {
if (score >= 70) return "A";
if (score >= 60) return "B";
return "F";
}
};
var GradeStrategy3 = function() {
this.getGrade = function(score) {
if (score >= 60) return "A";
if (score >= 50) return "B";
return "F";
}
};
var OverallStrategy = function() {
this.getGrade = function(score) {
if (score >= 90) return "A";
if (score >= 80) return "B";
if (score >= 70) return "C";
if (score >= 60) return "D";
if (score >= 50) return "E";
return "F";
}
};
function calculate() {
var strategy = new GradeStrategy();
var total = 0;
strategy.setStrategy(new GradeStrategy1());
total += get_score("page1", "result1", strategy);
strategy.setStrategy(new GradeStrategy2());
total += get_score("page2", "result2", strategy);
strategy.setStrategy(new GradeStrategy3());
total += get_score("page3", "result3", strategy);
strategy.setStrategy(new OverallStrategy());
var total_grade = strategy.getGrade(total / 3);
document.getElementById("overall").innerHTML = total_grade;
}
function get_score(score_from, result_to, strategy) {
var score = parseInt(document.getElementById(score_from).value);
document.getElementById(result_to).innerHTML = strategy.getGrade(score);
return score;
}
</script>